Methamphetamine use disorder (MUD) was associated with significantly lower levels of serum melatonin and disrupted circadian patterns compared with not having MUD, a new study showed. Melatonin levels ...

Find out how melatonin can promote sleep and understand possible side effects of this supplement.

Some studies point to melatonin use as beneficial to heart health, while others say the opposite. Here’s how to make sense of the complex research. Melatonin may be one of America’s most trusted sleep ...